vigr

The command line tool "vigr" is a utility found in most Unix-like operating systems, including Linux. It allows system administrators to conveniently edit the password and group databases.

When running the "vigr" command as root or with sudo privileges, it opens the /etc/group file with a text editor specified in the VISUAL or EDITOR environment variables. The file contains information about system groups such as their names, numeric IDs, and members.

By modifying this file with "vigr," administrators can add, delete, or modify group entries, which enables them to manage user groups effectively. For example, they can create a new group, assign users to different groups, change group names, or delete groups.

The "vigr" command has an important feature that it performs consistency checking. This ensures that changes made to the group database do not violate any rules or dependencies, preventing potential issues.

The use of "vigr" enhances system administration by providing a command line interface to quickly and safely manage group entries on a Unix-like system. Overall, it is a reliable and efficient tool for maintaining group databases, maintaining system security and organization.

Proper caution should be exercised when using "vigr" to avoid accidental modifications that could impact system operations or user access rights. It is recommended to have a backup or be familiar with the specific syntax and conventions of group entries before making changes.